Calendar



May 1, 192s. 1,667,855

H. GRUNOW CALENDAR Aug.. l. 1927 @if Y m El E INVENTOR. F., Hernan Gruqam e' A BY I9 7 ATTORNEY.

Patented May l, 1928.

UNITED STATES PATENT OFFICE.;

HERMAN GRUNOW, OF DETROIT, MICHIGAN.

CALENDAR.

Application ma August 1,1927. serial No. 209,709.

My invention relates to a new and useful improvement in a calendar so arranged 'that it may be used to determine the dates of the days oi the month tor practically any year 'by simply adjusting a movable part to the proper position on the supporting member.

It is an'object of the present invention to provide .a calendar of this class which will be simple in structure, durable in use, adaptlo yed for quickly determining the dates over long periods of time,iand one which may be easily and quickly operated and adjusted to its various positions.

Another object of the invention is the provision oit a perpetual calendar of this class arranged on a basis oi' twenty-eight years and so constructed as to provide for the additional days of the leap years. p

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parte hereinafter described and claimed.

The invention will be best understmd'liy a reference to the accompanying drawings which form a part of this specification and in which,

Fig. 1 is a front plan view of the invenw tion showing the supporting member in fragment.

Fig. 2 is a view similar to 1 with the movable part removed.

Fig. 3 is a sectional View taken on substantially line BH3 of Fig. 1.

Fig. 4 is a view taken on line 4-4 of Fig. 1.

In the drawings I have illust-rated the invention which comprises a supporting member 7 made from card board o-r other suitable y material. Extending vertically of this supe 40 porting member are the guide members 8 and 9 which, as shown in Fig. 3, extend through the member 7 and are formed T shaped, the guide strips 8 and 9 being spaced outwardly :trom the outer `face oi the supporting member 7 Appearing at one side o the supporting member are columns 10 above which appears a column 10 to indicate the nature of the display which ismounted in the columns 10, each of these columns 10 being divided into a plurality oi squares or sections. At the opposite side of the supporting member 7 appears a. column 11 which is divided into a plurality of squares or sect-ions, and above which appears the indicating square 11 to indicate the nature oi the display in the column 11. Positioned between the `columns 10 and 11, and preferida? *i Aappear the last two numbers of theyears ln the column l1 are. similarly displayed the last two numbers of the years 'which are leap years, the numbers of fthe yea-rs `displayed in the 'columns 10 and 11 covering a. period oi' twenty-eight years extending in a Aparticular arrangement shown 'from 21 to i8, the column 11 displaying the numbers of the years over those intervals which are not displayed in the columns 10.

In the columns 12 are-displayed the numbers corresponding to the numbers of the' days of the month in an arrangement coordinated with the arrangement of the years displayed in lthe columns 10 and 11.

A slidable member is ada ted for mount- -equallly spaced therefrom at the sides are a Aplurality of columns 12, each divided into :a

any

ing on the supporting mem er 7, being retained in position by the guide strips 8 and 9, this slidable member comprising a card board 13 having openings 14., 15 and 16 formed therein, the opening 14 being so arranged that when the card 13 is mounted in position on the supporting member 7, this opening will register, as the card is moved frame a portion or all of the' column 1l depending upon the position of the card 13 relatively to the support 7 Theportion 17 of the card which is positioned between the openings 15 and 16 is adapted for the display of the names of the days of the week and upon movement of the card 13 vertically on the support 7 is adapted to cover thev space between the edges of the columns 12 and 10. Similarly the portion 18 of the card lll 13 lying between the openings 111 and 1G serves to display the names of the days of the week and to cover the space between the column 11 and the edge of the columns 12.

At one side of the card is the portion 19 in which is displayed the names ot the months of the year, and at the opposite side of the card is the portion 2O in which is displayed the names oi the months ot the year.

In operation the card 13 is moved to the position in which the month under consideration registers with the column in which the year appears. For instance, if it is desired to know the days oi' the weel; on which the various dates in the month oif J une 1922 appeared, the card 13 would be moved to the position shown in Fig. 1, and the space or opening 11 would trame the numbers registering with the proper week day names to correspond to the month and year in question. Should it be desired to ascertain the dates of a certain month in 195i, since our display matter extends to the year 1948, it would be necessary to subtract from the year 1954i which would give the year 15126. Consequently in order to know the dates ol' the month of April 1951, the card 13 would be moved to the position shown in F ig. 1 in which the month of April registers with the numeral 2G displayed in the columns 10, the opening 11i serving to frame the numerals in the columns corresponding thereto, these numerals being in properregistration with the display matter in the column 1T or the column 18.

Should it be desired to ascertain the dates of the year 19114 'tor the month of June, the card 13 would be moved to the position shown in Fig. 1, the month of J une appearing in the column 20 being in registration with the numeral 44; appearing in the column 11, the opening 14 serving to l'rame the proper numbers displayed in the columns 12 which are in registration with the proper day of the week.

Should it be desired to use the calendar for a date prior to 1900, the calendar will indicate one day early owing to the fact that 1900 was not a leap year. Consequently, it the calendar should show the date appearing on Sunday it actually would appear on Monday tor all dates prior to 1900 or during the 19th century.

Consequently, it is seen that I have provided a. calendar which on its face will perpetually indicate all dates of the various months showing the day of the week for the period of time extending from March lst 1900 until February 28th 2100.

l/Vhile I have illustrated and described the preferred form o1 my invention, I do not wish to limit myself to the precise details ot structure shown, but desire to avail myself of such variations and modifications as come within the scope ot the appended claims.

Having thus described my invention what I claim as ne and desire lo secure by Letters Patentis:

1. A century calendar of the class dc- Scribed comprising: a supporting member having numerals in colmnns at one side thcre on indicating years. and numerals displayed at the opposite side thrrcol' imlicating years, said indicating numerals covering a period ol' twenty-eight years, the numerals at one side o said supporting member indicating the leap years, said member having displayed, intermediate said nmnerals, data indicating the nmnber ol the days olI thc month; a movable frame Vforming member movable on said supporting member and provided with openings l'or framing in its various positions ol' movement a portion ol said day indicating data to includey the days of a single month, said movable member having data displayed thereon l'or registering with said day indicating data ,so trained to indicate the day ot the wech corrcspomb ing to the date of the month framed; and month indicating data on said unusable member to register with a portion oi' .said year indicating data frame by said movable niember for indicating the month l'ramcd by thc day framing portion o l said movable parl.

2. A calendar olt the class described comprising: a supporting member having at. opposite sides columns o1 year indicatingl data covering a period ot twenty-eight years, the data at one side relating solely to the leap years; and day indicating data displayed on said member, intermediate said year indicating data columns; a movable member mounted on said supporting member having openings formed therein to frame a certain portion of .said day indicating data and said year indicating data. said movable member having displayed thereon data indicating the days of the week and the months oi the year arranged to correspond with the year indicating data and the da)l indicating data framed by said movable member. u

In testimony' whereof I have signed thc foregoing speci lication.

HERllIAN GRUNOIV. 

